Stop-valve



C. E. SBNNA.

STO? VALVE.

(No Mariel.)

110,301,761n Patented July 8, 1884.

UNITED STATES PATENT Prion.

STO P-VALV E.

SPECIFICATION forming part of Letters Patent 1\To.`301,'176l,` dated July 8, 1884.

Application ledJanuary 7, 1584.

To all whom it may con/cern:

Be it known that I, CHARLES E. Snivivn, of Boston, in the county of Suffolk and State of ldassachusetts, have invented certain Improvements in Stop-Valves, of which the following is a specication.

This invention relates to straight-way val ves, and has for its object to provide an improved construction combining cheapness, simplicity, and durability.

The invention consists in the combination, with the casing or shell having seats or guides for a sliding valve,arranged in somewhat close proximity bto each other,'for a purpose hereinafter described, of a solid valve made in a single piece, swiveled to a threaded valve- `stem in such a manner that it can be adjusted laterally independently of the stern, as I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure l represents a longitudinal section of niy improvedvalve. Fig. 2 represents a transverse section on line .c fr, Fig. l. Fig. 3 represents a longitudinal section of the shell or casing. Fig. 4 represents a side View of the Valve detached. Fig.

5 represents an edge view of the same.

The same letters of reference indicate the saine parts in all the figures.

In the drawings, a represents the shell or casing, having the valve-seats b c. The valve orgate is composed of asingle thin solid piece or plate, d, formed to lit the seats b c, and an enlarged or widenedv part, d', above'the part d, said widened portion having a T-shaped slot, e, which receives the shouldered end j' of the stein f', said shouldered end and slot constituting a swivel-connection, which enables the stein to slide the valve without rotating it. The slot e extends entirely across the part d of the valve, or from side to side thereof, so that the valve can be adjusted sidewise on the stein, and can therefore adjust itself to the seats Z1 c. Said seats do not therefore require to be located with particular reference to the valve or stem. The valve is so proportioned that when forced by the stem into the space between the seats b c it will boar closely (No model.)

It will be seen that the solid construction of the valve enables it to be :made so thin that the seats b c4 are brought into close proximity to each other, as shown in Figs. l and 3, so that steam, in passing through the valve, has not room to expand sufficiently in the space between said seats to enable it to attack and wear away the seat against which it would impinge if sufliciently expanded.

I am aware that a valve has been described in which a projection from the gate engages a shoulder on the valve-stem. In such case, however, the gate is not a continuation of the line of the stern, but is in a plane parallel therewith, and the movement of the stern must have 'more or less tendency to cranip the gate.

I claiml. In a straight-way valve, the combination, with the valve-seats, of the gate d, having an upper widened portion, cl, said widened part being slotted or out through from face to back, and having projections from each side toward the center above the slot, and the valvestein f, having a shoulder which enters the slot in part d', so that the gate and stem are in line with each other, substantially as shown.

2. In a' straight-way valve, the combination of the casing having seats I) c, the screwthreaded valve-stein f', having a shoulder, f, and the valve composed of a single solid thin piece or plate, d, and widened iortion d', provided with the transverse slot e, said slot receiving the shoulderf, and extending entirely across the valve, whereby the valve is adapted to be adjusted sidewise upon the stem.

In testimony whereof I have signed my name to this spccication, in the presence of two subscribing witnesses, this 15th day of December, 1883.

CHARLES E. SENNA.

Witnesses C. F. BROWN, Ji. L. 'Written 

